Re: Re: [Xen-users] Please help me size my server requirements

[Matej Zary <matej.zary@xxxxxxxxx>]

On Sat, 2010-07-03 at 23:19 +0530, Sanjay Arora wrote:
> I am looking to build a Workgroup Server. (Should be
> compatible/certified with both XEN & VMware hypervisors, as I am not
> sure which one I will settle with...comments requested)
> 
> To run baremetal on hypervisor, with each of the following services
> running virtualized with minimum OS install (CentOS 5.x, latest stable
> release).
> 
> - Multi-homed router-cum-border firewall (Access to Network Card
> limited to this instance...will act as router for rest of virtual
> machines).
> - DNS Server (djbDNS).
> - Mail Server (Qmail).
> - News Server (INN).
> - Webserver (Apache).
> - RDBMS (postgreSQL...highest load).
> 
> In addition to above the server to provide Windows RDP &/or Linux
> Desktop Thinclient to 5 users running diskless thin clients or old
> desktops (second highest load).
> 
> Server to have adequate amount of memory for the above and 500 GB/1 TB
> RAID 5 or better using SATA disks.
> 
> What Server Specs. I am looking at? I understand DB load is major in
> this but assuming moderate to medium db load, what do I need. Will
> seperate the server & Thinclient server six months/year down the road.
> 
> What budget? Recommendations for a processor/motherboard/ram/disks/sata card?
> 
> With best regards and thanks in advance.
> Sanjay Arora.
> 
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> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users

I would start with the DB requirements - how many IOPS are needed and
will be needed in future, how big is the DB - to scale the storage part
of the server (raid type, disk types, amount of them, amount of RAM).\

Generally is better to have more of smaller disk for better IOPS than
few large.

New installation of migration of existing system to virtual computers?
(in case of migration you can bench the existing DB to determine the
actual needs)

AMD or INTEL it depends on your preferences and needs. Both company
offer products with good value. I guess you should be OK with two socket
server (2x 4 cores or 2x 6 cores), but again, it depends on the actual
loads...you might be fine with one socket 1x 4 or 6 core too (but
generally is better to have some spare power for future needs too :).


Regards

Matej

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